MySQL Tutorial: Performance tracking statements

Source: Internet
Author: User
Tags mysql tutorial

Original link: http://blog.chinaunix.net/u/29134/showart_480834.html

The performance tracker provided by the MYSQL5.0 family is really cool.

Pay attention to two points.

1, but the version after 5.0.37

The manual describes the following: (show PROFILES and a were added in MySQL 5.0.37.)

Important

Please, that's show profiles and show PROFILES functionality are part of the MySQL 5.0 Community Server.

2, variable profiling is a user variable, each time you have to re-enable.

Here are some experiments I have done. The data are obvious and there is little explanation.

mysql> Use test

Database changed

Mysql> set profiling=1;

Query OK, 0 rows Affected (0.00 sec)

Mysql> Show tables;

+----------------+

| Tables_in_test |

+----------------+

| Bag_item |

| Bag_user |

| Score |

| T |

+----------------+

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